If you are excluding people based on net worth or the software they use (or don't use), both are ridiculous.
If you want to find additional people who use a certain software or have a certain net worth, that if fine, since you are not excluding people based on that. Making new friends is usually a good idea. But being elitist and looking down on people is where I draw the line.
If you know an instance is getting shut down in advance, you can delete your own posts before it gets shut down. Most platforms will send out a delete request to other instances. There is no guarantee that they will honor it, but most do.